Sliver can and seal therefor



P 1962 E. J. EADDY Q 3,053,410

SLIVER CAN AND SEAL THEREFOR Filed March 51, 1961 IN VEN TOR. gm 55f J@100) Arrmezve Y6.

United States Patent 3,053,410 SLIVER CAN AND SEAL THEREFOR Ernest J.Eaddy, Spartanburg, S.C., assignor to Sunray Company, Spartanburg, S.C.Filed Mar. 31, 1961, Ser. No. 99,848 2 Claims. (Cl. 22093) Thisinvention relates particularly to a seal for the metal lid of a slivercan or the like and has as its primary object the provision of aplastic, rubber, or other similar seal which will fill the customarilyleft clearance between the inside of a container and the outsidediameter of a spring biased false bottom sometimes referred to in thetrade as a lid to preclude sliver from going between the lid and thecontainer.

As conducive to a clearer understanding of this invention, it may herebe pointed out that sliver cans, sometimes called roving cans arecustomarily employed in the textile industry for collecting cotton,wool, or the like, from a coiling head. As the material leaves thecoiling head it is in a very weak state, and is usually piled or coiledinto 'a container, the container normally having a false bottomplatewh-ich is hereinafter termed a lid which is spring biased upwardly,thus maintaining a certain amount of tension of the sliver being placedin the can, thus giving a firm package. Additional, the spring and lidtend to keep the material at the top of the can so that in unloadingthis material there will be no tendency for the sliver to drag over theside of the container or to be lifted any great distance, as this actionwould cause the very weak untwisted fibers to stretch or break. Metallids have been customarily used for this purpose, and certain types oflids having skirts thereon have also been employed recently, since thenew high speed machinery requires more than the common dish lid. Thepiston spring serves to position the metal lid itself high enoughagainst the coiler head so that in star-ting the sliver into the can thespring causes a slight pressure against the coiler head, thus keepingthe sliver itself from slinging out of the path of the sliver beingreleased by the coiler head. If the piston head top were not against thecoiler head when starting the sliver would not stop on the top of thelid but would be thrown completely oil? the lid by centrifugal force.

Additionally, the skirt on the piston top lid serves the purpose ofaligning the lid with the container, as well as keeping the top surfaceof the metal lid level as it is depressed when loading or raised whenunloading.

In the case of conventional lids, the lid frequently tilts, permittingthe sliver to pass between the lid and the container thus causing waste,as well as a diflicult unloading problem because the sliver itself ispinched and broken. Since the containers themselves are frequentlyinaccurate in diameter, it is necessary to leave a clearance between theinside of the container and the outside diameter of the lid, for unlesssuflicient clearance is left the lid itself tends to bind and cause thespring to be of no value. A primary object of this invention is,therefore, the provision of a plastic seal surrounding the lid, eitherof conventional or piston type, to preclude sliver from passing betweenthe top of the lid and the side of the container. Additionally, duringdepression of the lid the outer periphery of the seal turns toward thetop, during depression and reverses its action during the unloading ofthe can. By virtue of the fact that the seal is in contact with thecontainer an air cushion of sorts is created between the lower side ofthe container and the bottom of the lid, and the air seal itselfproduces an equalizing action on the lid.

An additional object of the invention is the provision of an improvedmeans of assembling the seal of this character, which is simple andinexpensive, which may Patented Sept. 11, 1962 be applied to both theconventional and the piston type lids, and which may be assembled withexisting lids, or manufactured as a unit at the factory.

Still other objects reside in the combinations of elements, arrangementsof parts, and features of construc tion, all as will be more fullypointed out hereinafter and disclosed in the accompanying drawingwherein there are shown preferred embodiments of this inventive concept.

In the drawing:

FIGURE 1 is a side elevational view of the sliver can having a springbiased lid therein, showing the sliver coil on top, concealed portionsthereof being indicated in dotted lines.

FIGURE 2 is a sectional view taken substantially along the line 2-2 ofFIG. 1.

FIGURE 3 is an enlarged sectional view taken substantially along theline 3-3 of FIG. 2.

FIGURE 4 is an enlarged sectional view taken substantially along theline 4-4 of FIG. 2.

FIGURE 5 is an enlarged vertical sectional view showing a detail ofconstruction of the bottom of the sliver can, and

FIGURE 6 is a side sectional view similar to FIG. 3, but showing amodified form of construction.

Similar reference characters refer to similar parts throughout theseveral views of the drawing. 7

Having reference now to the drawings in detail, there is generallyindicated at 10 a sliver can, or as it is sometimes called in trade, aroving can, card can, or drawing frame can. The can is providedinteriorly with a lid 11, lid 11 being biased upwardly by a relativelylight coil spring 12, the upper coil 13 of which lies within a partiallyreverted rim portion 14, as shown in FIG. 3. The lid 11 is provided witha central opening 15, across the underside of which is stretched a baror wire 16 which is suitably secured thereto as by welding or the like.

A string or cord 17 is tied around the bar 16, and looped as at 18around the lowermost coil 19 of the spring 12 (see FIG. 5). The purposeof this string or cord is to adjust the height of the piston top out ofthe can. The string may, if desired, be attached to both sides of thebottom coil 19 and run over the bar, rather than being attached toeither end. The lid top is thus held to the proper height required towork properly under the coiler head. The springs are usually coiled toan extra inch or two of height so that there is a slight tension on thestring.

The bottom of the container or sliver can is closed by a bottom plate 20having an upstanding annular rim 2.1 suitably secured to the side wallof the can. A reinforcement or coaster 22 may surround the periphery ofbottom plate 20 as desired.

The above described material has heretofore been used in sliver cans,and it is to be noted that, as best shown in FIG. 3, the lid is, aspreviously stated, of lesser diameter than the interior of the can, topreclude binding of the lid upon itself when tilted by the uneven weightof a sliver S piled thereon or withdrawn therefrom.

In order to overcome the above difiiculty, the present invention wasdeveloped and a preferred form of construction according to same isshown in FIG. 3. There is here provided an annular flange 25 of plastic,rubber, or similar material, which is received within the 'sliver can 10and forms a sealing ring. This annular flange has its innercircumference reverted outwardly at 25c and then inwardly to form a flattop portion at 25a, an outturned bead 2512 'being formed between thereverted portions 25a and 250. At the top of the skirt 26 of the pistonthere is formed a bead 26a, which receives the bead between the mainbody of the flange 25 and the first reverted section 25c. The uppermostcoil 13 of the spring 12 is received between the top of the headedportion 26a of the skirt and the upper reverted section 25a of theannular flange. As the piston 26 moves downwardly the annular flange 25assumes an upwardly arcuate position as shown in FIG. 3; conversely, asthe piston moves upwardly, this flange a sumes the downward' positionshown in dotted lines, thus providing an equalizing air cushion betweenthe lid 11 and the bottom 20 of the can 10 at all times.

In the modification according to FIG. 6, the skirt 26 of the piston ishere omitted, only the lid 11 here being used. An expansion ring 27 ispositioned in the bead 25b on the annular flange 25 for expanding thebead radially outwardly into firm engagement with the circumferentialbead 14 on the lid 11.

From the foregoing it will now be seen that there is herein provided animproved lid for a sliver can, which substantially precludes catching orbreaking of the sliver between the'lid and the wall of the can, andwhich further accomplishes all the objects of this invention, andothers, including many advantages of great practical utility andcommercial importance.

As many embodiments may be made of this inventive concept, and as manymodifications may be made in the embodiment hereinbefore shown anddescribed, it is to be understood that all matter herein is to beinterpreted 25 merely as illustrative, and not in a limiting sense.

I claim:' 1. In a sliver can of the type having an internal springpressed lid of lesser diameter than the interior of the can to preventbinding of the lid when biased upwardly by said spring, an annularflexible sealing ring extending radially from said lid and engaging theinterior periphery of the can, a reverted edge on said lid, an upturnedflange in said sealing ring engaging in the bight of said reverted edge,and a resilient ring clamping said flange in said bight.

2. In a sliver can of the type having an internal spring pressed lid oflesser diameter than the diameter ofthe can to prevent binding of thelid when biased upwardly by said spring, an annular flexible sealingring extending radially from said lid and engaging the interiorperiphery of the can, a reverted edge on said lid, a skirt dependingfrom said lid and having a groove forming a lip engaging said revertededge, and an upturned flange on said sealing ring clampingly engagedbetween said lip and said reverted edge.

References Cited in the file of this patent UNITED STATES PATENTS593,333 Park Nov. 9, 1897 992,818 Speck May 23, 1911 2,018,261I-Ioldsworth Oct. 22, 1935 FOREIGN PATENTS 556,486 Italy Feb. 6, 1957

